Spark plug



July 2 1, 1925y 1,547,094

E. C. CHARLES S PARK PLUG Filed March 15 1923 INVENTOR Patented July 21, 1925.

UNITED sfr-A'rlezs 1,541,094 PATENT oral-C11.

EDWIN CHARLES, or QIL crrY, PENNSYLVANIA.

SPARK PLUG.

.Application led March 13, 1923. Seria1 No. 624,807.

T 0 all whom t may conce-rn Be it known that I, EDWIN C. CHARLES, a citizen ofthe United States, residing at Oil City,fin the county of Venango and State of Pennsylvania, have invented new and useful Improvements in Spark Plugs, of which the following is a' speciiieation.

This invention relates to pumps, and more particularly to what I term a sparkplug compression pump.

One of the main objects of the invention is to provide aY pumpof simple construction and operationwhich may be readily applied to the spark plug of an internal combustion engine for the purpose of utilizing one cylinder and piston of theengine as an air compressor or pump for inflating tires and other purposes. A furtherobject is to provide a pump of the character described of simple construction and operation which may be used in connection with a spark plug similar to a standard type of spark plug. A

further object is to provide simple and edicient means for detachably securing vvthe pump in operative position. jects will appear from the` detailed description. j i

In the drawings Figure 1 is a central vertical section through the spark plug adapted `for use in connection with the pump;

Figure 2 is atop plan view of the spark plug; Y

Figure 3 is a top plan view of the pump; Figure 4 is a section taken substantially on line 4 4 of Fig. 3; f Figure 5 is an end view of the pump. To permit the pump to be readily applied I use a spark plug such as that illustrated in Figures 1 and 2. This plug includes a body 1 having a depending neck 2 adapted to be threaded into the usual opening provided in cylinder A of the engine, this neck being provided with a terminal element 3.Y A head 4 fits into the upper portion of body 1 which is provided with an enlarged bore for this purpose, this head being provided with a reduced collar 5 which fits into body 1 so as to provide a shoulder between which and a corresponding shoulder in the body is positioned a packing gasket 6. `A lporcelain body 7 is mounted .in head 4 and is' secured in position by a ring 8 threaded into the upper end of the head, this body being provided with a screwstem 9 for reception of the usual nuts for attaching a terminal ele- Further obv ment of an electrical circuit. Acontact rod 10 extends from stem 9 and is spaced, at its lower end, from contact element 3 to provide a spark gap, which is made correct by the index stud 12"L with its large diameter portion. Body 1 is provided with outwardly projecting lugs 11 in which are secured studs 12 and 12a`whioh pass through openings provided throughlugs 13 projecting from head 4. Nuts 14`are threaded on the upper ends of studs 12 and 122L vand bear upon lugs 13 so as' to hold the head .4 tightly seated in body 1. In'prfactice one cylinderof the engine is provided with aspark plug of thel character illustrated and described.

When it is desired to utilize the pump nuts 14 are removed thus permitting ready removal of head 4 and the parts carried thereby, after whichV this head is replaced bythe pump. The pump includes -a casing lfffrom one end of which 'extends an intake tube 16.? A spider 17 -is ythreaded inthe outer end of this tube and carries,l at its inner end, a disc 18 between whichv anda disc 19 is secured an inwardly directedgcup washer 200i"` leather or. other suitable mate# rial. 'Iube 16 communicates, at its inner end, with tubular body 21 of casing 15 through an intake opening 22. A spider 23 provided with a nipple 28 adapted for reception of a length of rubber tubing or hose 29 by means of which the outlet of the pump,

can be readily connected to a tire or other object to be inflated. The lower portion 21fL of body 21 is adapted to lit into the upper portion of body 1 of the spark plug and is secured tightly in position by means of studs 12-and 12aL and nuts 14, the casing 15 being provided with outwardly projecting lugs 30 for reception of the studs. This provides simple and elicient means whereby the pump may be readily applied and, during operation of the engine, on the suction stro-keVV l of the piston air is drawn into the cylinder through intake tube 16 and on the compression stroke of the piston this air is forced through nipple 28 into tube 29 and thence into the tire or other' object to be inflated.

vThis provides very simple and eliicient means whereby the engine may be utilized as a pump for infiating tires or other objects.

I provide a pressure regulatingvalve from body 2l which has graduations on part 36 and permits the operator to set the pump for any pressure required to be inflated. At the opposite end o'l`4 easing 15 from intal'Le tube 16 l provide a. pressure regulating valve tube 31 which communicates with the bore of body 2l by an opening 32 in the outer end of which is normally seated a valve 33 ot truste-conical shape. This valve is provided With an outwardly projecting hollow cylindrical body 34 Within which seats one end or' a compression coil spring 35 the other end of which is seated in' a hollow plug 36 threaded into the outer end of tube 31. This plug is provided With an outlet bore 37 communicating at its inner end With the recess which receives the outer end of spring 35. By adjusting plug A36 the pressure at which the valve 33 will be unseated can be regulated to suit requirements' TVlien the air pressure Within body 21 of the pump easing l5 reaches the predetermined pressure valve 33 is unseated permitting the air to escape through opening 32 intoy tube 3l, this air being discharged through bore V37 oit' plug 36 into the atmosphere.

l/Vhile I have illustrated and described Cup `valves as used in the pump, I can, il' preferred, vuse any other Well known type or" valve such as ball valves, disc valves, ground seated valves, orany other suitable or preferred type of valves, as will be understood. As above indicated, changes in details of construction and arrangement of parts of the invention maybe resorted to Without departing from theeld Vandscope of the same, and l intend to include all such variations, as 'fall Within the scope oi' the app-ended clain in this application in which a preferred form only or' my invention is disclosed.

lil/'hat l claim is V- In a spark plug, a bodyhaving a neclr adapted to be secured in an opening in an in ernaL combustion engine cylinder, a head itting into said body, a second body carried by said head, a terminal member Vcarried by said second body, a terminal member carried 'by the Erst mentioned body, studs carried by said i'irst mentioned body,

said studs being differently shaped, the head be n@ provide-d with lugs having openings to receive the respective studs for position: ing the head in predetermined relation to the @rst mentioned body, and means coacting `with said studs for detachably securing the head and the first mentioned body together. y

In testimony whereof I allix my signature.

EDWIN C. CHAR-LES. 

